Some very useful sites there from Sally but having just done some trawling through the JY site I must give the reviews section of this site & those who take the time to post reviews an enormous thumbs up.
I am booked next month with TS on their "Unmissable China & Mighty Yangtze cruise" & I have recently gone through several of the forum threads picking up on some of the details on what to expect.
There is lots of very useful information there and I cite meals as just one example. The brochure says that these are inclusive but gives no detail on the practicalities whereas from the forum I have picked up that there have been tables for the group, dishes on a lazy susan, what sort of dishes to expect, what drinks are included & how much extra things like wine cost.
Also there is a lot of useful other information there about the reality of the trips and the optionals which are by no means deal breakers do help in the planning of what to expect.
So keep those reviews coming - especially updating any changes that have occurred.